"Southerly flow on the ocean waters could increase to 15 to 20 knots with 20- to 25-knot gusts," the service said. "Seas will build to 5 to 7 feet starting Sunday, and those rough seas could linger into the start of the new workweek."

Long Island's Thursday forecast calls for cloudy skies, a 30 to 40 percent chance for rain and daily highs in the low to mid 70s, the service said.